EQBase

Headphone EQ

Moondrop Chu EQ settings for Mac

Last updated: August 6, 2026

Moondrop Chu has 11 published AutoEQ corrections, from 11 measurement rigs, and this page carries every one of them. Below is the curve, the exact parametric filters behind it, and a one-click preset for EQBase. macOS has no system-wide equalizer of its own, so applying a correction to everything your Mac plays, rather than inside a single player, needs an app that sits on the system audio path.

Each measurement below carries four things: the correction curve, its parametric filters, the same filters as copy-paste text in AutoEQ's format (which Equalizer APO and Peace, REW and most desktop parametric equalizers import, and which EQBase's own Expert EQ reads and writes), and EQBase's ten-band fit of that correction. The ten-band figures are what the downloadable preset applies, so what you hear matches what is written here. AutoEQ publishes its own ten-band file on the same grid, fitted to the raw measurement rather than to these filters, so the two agree closely through the midrange and can differ at the extremes.

-12-6+0+6+12201001k10k20k

Measured by oratory1990. Preamp −2.2 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+0.8 dB0.70
Peak8.73 kHz+2.3 dB2.40
Peak660 Hz+1.2 dB1.92
Peak165 Hz−1.2 dB1.08
Peak69 Hz+1.7 dB1.26
High shelf10 kHz−2.5 dB0.70
Peak1.47 kHz−1.1 dB1.68
Peak942 Hz+0.7 dB2.78
Peak4.15 kHz+0.6 dB3.72
Peak2.77 kHz−0.5 dB3.46

Copy into another equalizer

Preamp: -2.2 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.8 dB Q 0.70
Filter 2: ON PK Fc 8728 Hz Gain 2.3 dB Q 2.40
Filter 3: ON PK Fc 660 Hz Gain 1.2 dB Q 1.92
Filter 4: ON PK Fc 165 Hz Gain -1.2 dB Q 1.08
Filter 5: ON PK Fc 69 Hz Gain 1.7 dB Q 1.26
Filter 6: ON HSC Fc 10000 Hz Gain -2.5 dB Q 0.70
Filter 7: ON PK Fc 1470 Hz Gain -1.1 dB Q 1.68
Filter 8: ON PK Fc 942 Hz Gain 0.7 dB Q 2.78
Filter 9: ON PK Fc 4153 Hz Gain 0.6 dB Q 3.72
Filter 10: ON PK Fc 2772 Hz Gain -0.5 dB Q 3.46

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz+0.7 dB
62 Hz+2.1 dB
125 Hz−0.4 dB
250 Hz−0.6 dB
500 Hz+0.5 dB
1 kHz+0.6 dB
2 kHz−0.7 dB
4 kHz+0.4 dB
8 kHz+1.6 dB
16 kHz−2.3 dB
Preamp−2.2 dB
-12-6+0+6+12201001k10k20k

Measured by crinacle. Preamp −3.3 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+0.3 dB0.70
Peak392 Hz+2.7 dB1.24
Peak5.68 kHz−4.7 dB1.96
Peak79 Hz+3.0 dB1.74
Peak1.64 kHz−1.1 dB1.71
High shelf10 kHz+0.9 dB0.70
Peak120 Hz−1.5 dB3.65
Peak99 Hz+1.6 dB6.00
Peak759 Hz+0.3 dB2.35
Peak48 Hz+0.4 dB3.00

Copy into another equalizer

Preamp: -3.3 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.3 dB Q 0.70
Filter 2: ON PK Fc 392 Hz Gain 2.7 dB Q 1.24
Filter 3: ON PK Fc 5680 Hz Gain -4.7 dB Q 1.96
Filter 4: ON PK Fc 79 Hz Gain 3.0 dB Q 1.74
Filter 5: ON PK Fc 1642 Hz Gain -1.1 dB Q 1.71
Filter 6: ON HSC Fc 10000 Hz Gain 0.9 dB Q 0.70
Filter 7: ON PK Fc 120 Hz Gain -1.5 dB Q 3.65
Filter 8: ON PK Fc 99 Hz Gain 1.6 dB Q 6.00
Filter 9: ON PK Fc 759 Hz Gain 0.3 dB Q 2.35
Filter 10: ON PK Fc 48 Hz Gain 0.4 dB Q 3.00

Ten-band version

BandGain
31 Hz+0.2 dB
62 Hz+2.2 dB
125 Hz−0.7 dB
250 Hz+1.0 dB
500 Hz+1.9 dB
1 kHz−0.1 dB
2 kHz−0.6 dB
4 kHz−1.3 dB
8 kHz−1.3 dB
16 kHz+0.9 dB
Preamp−3.3 dB
-12-6+0+6+12201001k10k20k

Measured by Super Review. Preamp −2.5 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+2.4 dB0.70
Peak173 Hz−1.2 dB1.20
Peak109 Hz+1.2 dB0.99
Peak720 Hz+1.2 dB1.57
Peak149 Hz−0.8 dB1.07
High shelf10 kHz−3.3 dB0.70
Peak2.94 kHz+0.7 dB1.10
Peak1.47 kHz−0.8 dB2.31
Peak8.48 kHz+1.6 dB4.76
Peak6.74 kHz−0.8 dB6.00

Copy into another equalizer

Preamp: -2.5 dB
Filter 1: ON LSC Fc 105 Hz Gain 2.4 dB Q 0.70
Filter 2: ON PK Fc 173 Hz Gain -1.2 dB Q 1.20
Filter 3: ON PK Fc 109 Hz Gain 1.2 dB Q 0.99
Filter 4: ON PK Fc 720 Hz Gain 1.2 dB Q 1.57
Filter 5: ON PK Fc 149 Hz Gain -0.8 dB Q 1.07
Filter 6: ON HSC Fc 10000 Hz Gain -3.3 dB Q 0.70
Filter 7: ON PK Fc 2939 Hz Gain 0.7 dB Q 1.10
Filter 8: ON PK Fc 1474 Hz Gain -0.8 dB Q 2.31
Filter 9: ON PK Fc 8477 Hz Gain 1.6 dB Q 4.76
Filter 10: ON PK Fc 6744 Hz Gain -0.8 dB Q 6.00

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz+2.1 dB
62 Hz+2.0 dB
125 Hz+0.2 dB
250 Hz−0.8 dB
500 Hz+0.4 dB
1 kHz+0.4 dB
2 kHz+0.1 dB
4 kHz+0.3 dB
8 kHz+0.7 dB
16 kHz−3.0 dB
Preamp−2.5 dB
-12-6+0+6+12201001k10k20k

Measured by HypetheSonics. Preamp −2.2 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+0.8 dB0.70
Peak66 Hz+1.6 dB1.03
Peak1.45 kHz−1.3 dB1.18
Peak713 Hz+1.3 dB1.04
Peak180 Hz−0.8 dB1.30
High shelf10 kHz−6.0 dB0.70
Peak9.43 kHz+2.0 dB0.97
Peak5.12 kHz−1.4 dB3.91
Peak6.61 kHz+1.4 dB3.07
Peak2.56 kHz−0.2 dB2.87

Copy into another equalizer

Preamp: -2.2 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.8 dB Q 0.70
Filter 2: ON PK Fc 66 Hz Gain 1.6 dB Q 1.03
Filter 3: ON PK Fc 1446 Hz Gain -1.3 dB Q 1.18
Filter 4: ON PK Fc 713 Hz Gain 1.3 dB Q 1.04
Filter 5: ON PK Fc 180 Hz Gain -0.8 dB Q 1.30
Filter 6: ON HSC Fc 10000 Hz Gain -6.0 dB Q 0.70
Filter 7: ON PK Fc 9434 Hz Gain 2.0 dB Q 0.97
Filter 8: ON PK Fc 5119 Hz Gain -1.4 dB Q 3.91
Filter 9: ON PK Fc 6608 Hz Gain 1.4 dB Q 3.07
Filter 10: ON PK Fc 2559 Hz Gain -0.2 dB Q 2.87

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz+0.8 dB
62 Hz+2.1 dB
125 Hz+0.1 dB
250 Hz−0.4 dB
500 Hz+0.7 dB
1 kHz+0.1 dB
2 kHz−0.7 dB
4 kHz+0.0 dB
8 kHz+1.4 dB
16 kHz−4.5 dB
Preamp−2.2 dB
-12-6+0+6+12201001k10k20k

Measured by Harpo. Preamp −1.8 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+0.7 dB0.70
Peak184 Hz−0.9 dB0.94
Peak641 Hz+1.0 dB2.04
Peak66 Hz+1.3 dB0.91
Peak7.28 kHz+1.1 dB2.14
High shelf10 kHz−3.4 dB0.70
Peak1.39 kHz−0.8 dB1.90
Peak8.73 kHz+1.5 dB3.82
Peak3.8 kHz+0.5 dB3.04
Peak876 Hz+0.5 dB2.93

Copy into another equalizer

Preamp: -1.8 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.7 dB Q 0.70
Filter 2: ON PK Fc 184 Hz Gain -0.9 dB Q 0.94
Filter 3: ON PK Fc 641 Hz Gain 1.0 dB Q 2.04
Filter 4: ON PK Fc 66 Hz Gain 1.3 dB Q 0.91
Filter 5: ON PK Fc 7276 Hz Gain 1.1 dB Q 2.14
Filter 6: ON HSC Fc 10000 Hz Gain -3.4 dB Q 0.70
Filter 7: ON PK Fc 1388 Hz Gain -0.8 dB Q 1.90
Filter 8: ON PK Fc 8732 Hz Gain 1.5 dB Q 3.82
Filter 9: ON PK Fc 3801 Hz Gain 0.5 dB Q 3.04
Filter 10: ON PK Fc 876 Hz Gain 0.5 dB Q 2.93

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz+0.8 dB
62 Hz+1.7 dB
125 Hz−0.0 dB
250 Hz−0.6 dB
500 Hz+0.4 dB
1 kHz+0.2 dB
2 kHz−0.3 dB
4 kHz+0.4 dB
8 kHz+1.6 dB
16 kHz−3.1 dB
Preamp−1.8 dB
-12-6+0+6+12201001k10k20k

Measured by Filk. Preamp −2.9 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+3.0 dB0.70
Peak5.23 kHz−1.2 dB1.49
Peak8.21 kHz+2.0 dB3.09
Peak743 Hz+0.8 dB1.53
Peak1.29 kHz−0.9 dB2.00
High shelf10 kHz+0.1 dB0.70
Peak234 Hz−0.6 dB1.57
Peak41 Hz−0.3 dB2.02
Peak428 Hz+0.2 dB1.20
Peak72 Hz+0.2 dB2.46

Copy into another equalizer

Preamp: -2.9 dB
Filter 1: ON LSC Fc 105 Hz Gain 3.0 dB Q 0.70
Filter 2: ON PK Fc 5231 Hz Gain -1.2 dB Q 1.49
Filter 3: ON PK Fc 8215 Hz Gain 2.0 dB Q 3.09
Filter 4: ON PK Fc 743 Hz Gain 0.8 dB Q 1.53
Filter 5: ON PK Fc 1291 Hz Gain -0.9 dB Q 2.00
Filter 6: ON HSC Fc 10000 Hz Gain 0.1 dB Q 0.70
Filter 7: ON PK Fc 234 Hz Gain -0.6 dB Q 1.57
Filter 8: ON PK Fc 41 Hz Gain -0.3 dB Q 2.02
Filter 9: ON PK Fc 428 Hz Gain 0.2 dB Q 1.20
Filter 10: ON PK Fc 72 Hz Gain 0.2 dB Q 2.46

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz+2.4 dB
62 Hz+2.2 dB
125 Hz+0.6 dB
250 Hz−0.7 dB
500 Hz+0.5 dB
1 kHz−0.0 dB
2 kHz−0.1 dB
4 kHz−0.9 dB
8 kHz+1.8 dB
16 kHz−0.2 dB
Preamp−2.9 dB
-12-6+0+6+12201001k10k20k

Measured by ToneDeafMonk. Preamp −1.9 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz−0.3 dB0.70
Peak188 Hz−1.4 dB0.90
Peak2.4 kHz+1.9 dB2.49
Peak65 Hz+1.7 dB1.05
Peak675 Hz+0.8 dB1.75
High shelf10 kHz−4.8 dB0.70
Peak6.73 kHz+2.1 dB2.05
Peak4.36 kHz−1.2 dB2.47
Peak1.27 kHz−0.4 dB3.17
Peak3.04 kHz+0.4 dB4.17

Copy into another equalizer

Preamp: -1.9 dB
Filter 1: ON LSC Fc 105 Hz Gain -0.3 dB Q 0.70
Filter 2: ON PK Fc 188 Hz Gain -1.4 dB Q 0.90
Filter 3: ON PK Fc 2404 Hz Gain 1.9 dB Q 2.49
Filter 4: ON PK Fc 65 Hz Gain 1.7 dB Q 1.05
Filter 5: ON PK Fc 675 Hz Gain 0.8 dB Q 1.75
Filter 6: ON HSC Fc 10000 Hz Gain -4.8 dB Q 0.70
Filter 7: ON PK Fc 6733 Hz Gain 2.1 dB Q 2.05
Filter 8: ON PK Fc 4364 Hz Gain -1.2 dB Q 2.47
Filter 9: ON PK Fc 1271 Hz Gain -0.4 dB Q 3.17
Filter 10: ON PK Fc 3044 Hz Gain 0.4 dB Q 4.17

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz−0.1 dB
62 Hz+1.4 dB
125 Hz−0.5 dB
250 Hz−1.0 dB
500 Hz+0.3 dB
1 kHz−0.0 dB
2 kHz+1.2 dB
4 kHz−0.7 dB
8 kHz+0.9 dB
16 kHz−4.2 dB
Preamp−1.9 dB
-12-6+0+6+12201001k10k20k

Measured by Regan Cipher. Preamp −4.3 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+8.3 dB0.70
Peak46 Hz−6.0 dB0.38
Peak6.32 kHz+3.3 dB1.54
Peak669 Hz+2.6 dB0.88
Peak849 Hz−1.5 dB0.29
High shelf10 kHz−3.6 dB0.70
Peak9.3 kHz+1.6 dB2.37
Peak1.31 kHz−0.6 dB5.99
Peak903 Hz+0.3 dB3.83
Peak2.11 kHz+0.2 dB3.95

Copy into another equalizer

Preamp: -4.3 dB
Filter 1: ON LSC Fc 105 Hz Gain 8.3 dB Q 0.70
Filter 2: ON PK Fc 46 Hz Gain -6.0 dB Q 0.38
Filter 3: ON PK Fc 6317 Hz Gain 3.3 dB Q 1.54
Filter 4: ON PK Fc 669 Hz Gain 2.6 dB Q 0.88
Filter 5: ON PK Fc 849 Hz Gain -1.5 dB Q 0.29
Filter 6: ON HSC Fc 10000 Hz Gain -3.6 dB Q 0.70
Filter 7: ON PK Fc 9302 Hz Gain 1.6 dB Q 2.37
Filter 8: ON PK Fc 1306 Hz Gain -0.6 dB Q 5.99
Filter 9: ON PK Fc 903 Hz Gain 0.3 dB Q 3.83
Filter 10: ON PK Fc 2106 Hz Gain 0.2 dB Q 3.95

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz+2.6 dB
62 Hz+1.3 dB
125 Hz−0.8 dB
250 Hz−1.3 dB
500 Hz+0.6 dB
1 kHz+0.3 dB
2 kHz−0.6 dB
4 kHz+0.3 dB
8 kHz+2.6 dB
16 kHz−3.2 dB
Preamp−4.3 dB
-12-6+0+6+12201001k10k20k

Measured by freeryder05. Preamp −2.2 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+1.1 dB0.70
Peak664 Hz+1.4 dB1.46
Peak193 Hz−1.1 dB1.83
Peak63 Hz+1.3 dB1.33
Peak6.31 kHz−0.8 dB2.86
High shelf10 kHz−5.2 dB0.70
Peak8.64 kHz+2.5 dB3.57
Peak1.34 kHz−0.6 dB2.34
Peak2.79 kHz+0.4 dB1.14
Peak894 Hz+0.3 dB3.47

Copy into another equalizer

Preamp: -2.2 dB
Filter 1: ON LSC Fc 105 Hz Gain 1.1 dB Q 0.70
Filter 2: ON PK Fc 664 Hz Gain 1.4 dB Q 1.46
Filter 3: ON PK Fc 193 Hz Gain -1.1 dB Q 1.83
Filter 4: ON PK Fc 63 Hz Gain 1.3 dB Q 1.33
Filter 5: ON PK Fc 6312 Hz Gain -0.8 dB Q 2.86
Filter 6: ON HSC Fc 10000 Hz Gain -5.2 dB Q 0.70
Filter 7: ON PK Fc 8637 Hz Gain 2.5 dB Q 3.57
Filter 8: ON PK Fc 1339 Hz Gain -0.6 dB Q 2.34
Filter 9: ON PK Fc 2790 Hz Gain 0.4 dB Q 1.14
Filter 10: ON PK Fc 894 Hz Gain 0.3 dB Q 3.47

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz+1.0 dB
62 Hz+2.1 dB
125 Hz+0.0 dB
250 Hz−0.6 dB
500 Hz+0.8 dB
1 kHz+0.4 dB
2 kHz+0.1 dB
4 kHz+0.0 dB
8 kHz+1.1 dB
16 kHz−4.6 dB
Preamp−2.2 dB
-12-6+0+6+12201001k10k20k

Measured by kr0mka. Preamp −2.1 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+0.6 dB0.70
Peak91 Hz+2.0 dB0.58
Peak140 Hz−2.0 dB2.30
Peak670 Hz+1.1 dB1.98
Peak218 Hz−1.2 dB1.42
High shelf10 kHz−2.3 dB0.70
Peak8.62 kHz+2.4 dB3.80
Peak1.39 kHz−0.9 dB1.75
Peak910 Hz+0.6 dB3.22
Peak4.22 kHz+0.5 dB3.46

Copy into another equalizer

Preamp: -2.1 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.6 dB Q 0.70
Filter 2: ON PK Fc 91 Hz Gain 2.0 dB Q 0.58
Filter 3: ON PK Fc 140 Hz Gain -2.0 dB Q 2.30
Filter 4: ON PK Fc 670 Hz Gain 1.1 dB Q 1.98
Filter 5: ON PK Fc 218 Hz Gain -1.2 dB Q 1.42
Filter 6: ON HSC Fc 10000 Hz Gain -2.3 dB Q 0.70
Filter 7: ON PK Fc 8618 Hz Gain 2.4 dB Q 3.80
Filter 8: ON PK Fc 1390 Hz Gain -0.9 dB Q 1.75
Filter 9: ON PK Fc 910 Hz Gain 0.6 dB Q 3.22
Filter 10: ON PK Fc 4225 Hz Gain 0.5 dB Q 3.46

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz+0.8 dB
62 Hz+1.9 dB
125 Hz−0.2 dB
250 Hz−0.7 dB
500 Hz+0.5 dB
1 kHz+0.4 dB
2 kHz−0.4 dB
4 kHz+0.3 dB
8 kHz+1.6 dB
16 kHz−2.2 dB
Preamp−2.1 dB
-12-6+0+6+12201001k10k20k

Measured by Ted's Squig Hoard. Preamp −2.3 dB. Correction data from the AutoEQ project.

Download the EQBase presetGet EQBase free

Parametric filters

TypeFrequencyGainQ
Low shelf105 Hz+0.7 dB0.70
Peak153 Hz−1.2 dB1.12
Peak69 Hz+1.6 dB0.66
Peak186 Hz−0.9 dB1.07
Peak97 Hz+0.7 dB0.84
High shelf10 kHz−3.4 dB0.70
Peak8.48 kHz+2.3 dB1.56
Peak2.24 kHz+1.0 dB2.58
Peak768 Hz+0.8 dB1.92
Peak1.3 kHz−0.9 dB2.02

Copy into another equalizer

Preamp: -2.3 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.7 dB Q 0.70
Filter 2: ON PK Fc 153 Hz Gain -1.2 dB Q 1.12
Filter 3: ON PK Fc 69 Hz Gain 1.6 dB Q 0.66
Filter 4: ON PK Fc 186 Hz Gain -0.9 dB Q 1.07
Filter 5: ON PK Fc 97 Hz Gain 0.7 dB Q 0.84
Filter 6: ON HSC Fc 10000 Hz Gain -3.4 dB Q 0.70
Filter 7: ON PK Fc 8480 Hz Gain 2.3 dB Q 1.56
Filter 8: ON PK Fc 2241 Hz Gain 1.0 dB Q 2.58
Filter 9: ON PK Fc 768 Hz Gain 0.8 dB Q 1.92
Filter 10: ON PK Fc 1296 Hz Gain -0.9 dB Q 2.02

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version

BandGain
31 Hz+1.0 dB
62 Hz+2.2 dB
125 Hz−0.0 dB
250 Hz−0.8 dB
500 Hz+0.2 dB
1 kHz−0.1 dB
2 kHz+0.6 dB
4 kHz−0.0 dB
8 kHz+1.8 dB
16 kHz−2.9 dB
Preamp−2.3 dB

What this correction changes

The largest boost is +2.1 dB at bass (62 Hz), and the largest cut is −2.3 dB at top octave (16 kHz). Total swing across the ten bands is 4.4 dB. Averaged over its bands the bass is lifted by 0.8 dB, more than the other two, which is where most of the audible change lands.

The 11 published measurements on this page, from 11 rigs, do not agree with each other, and the size of the disagreement is worth knowing before picking one. They differ most at top octave (16 kHz), where the ten-band figures span 5.5 dB, and least at midrange (1 kHz), where they span 0.7 dB.

Applying this on a Mac

The Moondrop Chu is an in-ear monitor, and its bass depends far more on the seal than on anything in this correction. A tip that does not seal loses the low bass outright, and no amount of boost puts it back. If the bottom end still sounds missing after applying this, change tips and re-seat them before deciding the curve is wrong.

In-ears are sensitive enough that a Mac's own output drives them without help, so the correction is doing all of the work here rather than sharing it with an amplifier.

In EQBase the fastest route skips this page entirely: open the Headphones pane, search for your model, and apply the correction. The Moondrop Chu is in the built-in catalog along with 8,665 other models. The preset above exists for people who want to see the numbers first, or who want a specific measurement rather than the default one.

Either way the correction applies to every app at once, and the free tier carries it with no time limit. The Moondrop Chu preset above sets the ten-band curve, which is what the free tier applies, so nothing on this page is behind a purchase.

Common questions

Do these EQ settings work on any Mac app?

Yes, if the equalizer runs on system audio rather than inside one player. EQBase processes everything the Mac plays, so the same correction applies to Spotify, Safari, YouTube, games and calls. The Music app's own equalizer only affects Music.

Where do the Moondrop Chu numbers come from?

From 11 published AutoEQ measurements of the Moondrop Chu, made by oratory1990, crinacle, Super Review, HypetheSonics, Harpo, Filk, ToneDeafMonk, Regan Cipher, freeryder05, kr0mka and Ted's Squig Hoard. Each one is a real frequency-response measurement compared against a target curve, and each produces its own set of filters. They are all on this page rather than averaged together, because a measurement belongs to the person who made it.

Why is the Moondrop Chu preamp negative?

The Moondrop Chu correction needs −2.2 dB of headroom on its default measurement, so the preset pulls the signal down by that much before the boosts are applied. Boosting a signal that is already near full scale would clip it, and the negative preamp is what buys the room. Skip it and loud passages distort. That is a small figure, meaning this correction is mostly cuts rather than boosts, so it costs very little loudness.

Can I use these filters in a different equalizer?

Yes. The filter table is a standard parametric list: type, frequency, gain and Q. Any parametric equalizer that accepts those four values per band will take them, on any platform. The one-click preset is only a shortcut for EQBase users.

Other headphones with published corrections

Credits

Correction data from the AutoEQ project by Jaakko Pasanen, used under the MIT licence. The measurements themselves are the work of the people credited on each curve above. EQBase ships the same catalog in the app, with the same attribution.

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